During the tests for JBoss, there was a very high load on the network switches for multicast in the instant replication test. This was not seen on weblogic. The application code run on all the tests were identical, as was the hardware that it was run on.
Looking at the results, weblogic seems to be 10 times faster than the JBoss/Tomcat bundle. At first I suspected the multicast overhead, but then there was little difference in the 2 sec replication interval and non-replicated tests. This points to performance problems on the tomcat container.
You can try switching to Jetty instead of Tomcat: ftp://jetty.mortbay.org/pub/jboss-3.2-jetty-4.2.19.sar
Once upon a time Jetty was much quicker than tomcat. Don't know about the recent versions.
Vlad
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